Brain development of infant is described as

• A. Heart grows fastest.
• B. Lungs grow fastest.
• C. Brain grows fastest.
• D. Muscles grow fastest.

Answer: (C)

In infancy, the brain grows at an extraordinary pace, making it the fastest-growing part of the body in those early years. This rapid expansion comes from a surge of neuron production and an explosion of connections between neurons (synapses), which creates the groundwork for all cognitive, motor, and sensory skills. Myelination also speeds up nerve signaling, helping babies learn to crawl, walk, listen, and speak more quickly as their experiences shape the growing brain. Because of this intense development, the brain’s weight climbs from about a quarter of an adult brain at birth to roughly three-quarters by about age two, illustrating how central early experience and maturation are to shaping thinking and behavior. The heart and lungs do grow, and muscles develop, but their growth rates are not as rapid as the brain’s during these first years.